@article{02150492,
title = {On the number of perfect binary quadratic forms.},
journal = {Experimental Mathematics},
volume = {13},
year = {2004},
pages = {451-457},
doi = {10.1080/10586458.2004.10504554},
zbl = {1133.11310},
language = {en},
url = {http://dml.mathdoc.fr/item/02150492}
}
Aicardi, Francesca. On the number of perfect binary quadratic forms.. Experimental Mathematics, Tome 13 (2004) pp. 451-457. doi : 10.1080/10586458.2004.10504554. http://gdmltest.u-ga.fr/item/02150492/